[PATCH v3 5/6] thermal/drivers/mediatek/lvts_thermal: Don't leave threshold zeroed

[AngeloGioacchino Del Regno]

Il 06/07/23 17:37, Nícolas F. R. A. Prado ha scritto:
> The thermal framework might leave the low threshold unset if there
> aren't any lower trip points. This leaves the register zeroed, which
> translates to a very high temperature for the low threshold. The
> interrupt for this threshold is then immediately triggered, and the
> state machine gets stuck, preventing any other temperature monitoring
> interrupts to ever trigger.
> 
> (The same happens by not setting the Cold or Hot to Normal thresholds
> when using those)
> 
> Set the unused threshold to a valid low value. This value was chosen so
> that for any valid golden temperature read from the efuse, when the
> value is converted to raw and back again to milliCelsius, the result
> doesn't underflow.
> 
> Fixes: f5f633b18234 ("thermal/drivers/mediatek: Add the Low Voltage Thermal Sensor driver")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado at collabora.com>
> 

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>